Improvement in carriage-knobs



G. L. GRANDAL. Garriage-Kn0bs..

No. 198,840. Patefited Jan. 1,1878.

Jay's N.FEI'ERSv PNOTOLPTMQGRAPHER. WASHiNGTON. D. C.

UNITED STATES PATENT OEEIoE.

GEORGE L. GBANDAL, or BINGHAMTON, NEW YORK.

IMPROVEMENT IN CARRIAGE-KNOBS.

Specification forming part of Letters PatentNo. 198,840, dated January 1, 1 878 application filed November 26, 1877.

lowing is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the ac companying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention consists of a screw-shanked carriage knob, provided with indentations, nicks, or projections on the inner or under side of the head, and adapted to receive the action of a griping wrench or jaws, whereby it may be forced in or withdrawn without liability to scratch or injure the surface of finely-finished carriage-bodies, or other parts into which the knob is screwed.

By my invention the knob is screwed in by grasping the head, and not the base, as hitherto.

Such knobs have hitherto been made with a many-sided base, and the wrench has been applied thereto in such manner that its end would be liable to bear against and mm the surface of the carriage-body besides, the knob thus formed must necessarily be heavy, and

of a clumsy, unfinished appearance.

By my invention the knob has alight and neat base, and the under part of the knob proper has the provision for receiving the griping-jaws away from the base, and avoiding all danger of defacing the surface into which the knob is screwed.

The knob nicks or projections are invisible from the front or show end, and are on opposite sides of the neck, or arranged in such manner as to receive the applying device, which must be adapted for the purpose of driving or withdrawing the knob.

Referring to the drawings, Figure l represents an elevation of a screw-shanked knob embracing my invention; Fig. 2, a section;

and Fig. 3, a cross-section, looking atthenotched or nicked inner or under side of the knob-head. Figs. 4, 5, and 6 are similar views of the knob'with head projections for the applying device.

The carriage-knob, or similar button, hasv the usual knob a, screw-shank b, and base or body 0, and these may be of any suitable form and construction. The inner or under side of the head or knob a has formed, in any suita- V blemanner, nicks, indentations, or their equivalent projections d, adapted to receive the jaws 0f the wrench. These notches, indentations,

or projections I prefer to make radial, and on opposite sides of the knob, proper, at its junction with the neck of the body, so that the jaws of the applying device will embrace the head a, and, taking into the notches (without other purposes, having the under or inner side of its knob proper formed with holds for the applying device.

In testimony that I claim the foregoing I have affixed my signature in the presence of two witnesses.

GEO. L. GRANDAL.

Witnesses:

H. S. ORANDAL, JOHN LAGRANGE. 

